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Duplex scanning is a feature of some computer scanners, and multifunction printers (MFPs) that support duplex printing. A duplex scanner can automatically scan a sheet of paper on both sides. Scanners without this capability can only scan both sides of a sheet of paper by reinserting it manually the other way up.
Single-sided printers can print on both sides of the paper via manual removal and turning over of a stack of sheets after one side is printed on; however, the user has to manually turn the (half-done) print job over and re-invoke the printing of the document, with care to ensure that the order and orientation is correct.
There are two kinds of document feeders capable of two-sided (duplex) scanning: a reversing automatic document feeder or RADF scans one side of a page, then flips it and scans the other side. A duplexing automatic document feeder or DADF scans both sides in one pass. The advantage of the DADF is faster speed for two-sided originals.
However, if you need to do more scanning, more often, a sheet-feed scanner will be better, as this type lets you scan several pages at once via an automatic document feeder (ADF).
When you control-click on your mousepad (similar to right click, press the pad with two fingers) in one of these apps, you should see a menu that has a “Scan Document” option toward the bottom ...
Document scanners have document feeders, usually larger than those sometimes found on copiers or all-purpose scanners. Scans are made at high speed, from 20 up to 420 pages per minute, often in grayscale, although many scanners support color. Many scanners can scan both sides of double-sided originals (duplex operation).
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